Ecological impacts of winter wheat and summer maize straw incorporation in Huantai County, Shandong Province

As the first "ton of grain county" in the north of the Yangtze River, Huantai County in Shandong Province has developed rapidly since 1980. With the decrease in fuel demand and the separation of animal husbandry and crop production, crop straw processing has increasingly become local farmers The huge challenge faced by technical personnel and technical personnel. Since 1980, the proportion of winter wheat and summer corn stalks returned to the field has gradually increased. By 2010, almost all the straws in the two seasons have been returned to the field. We consult the yearbook data and combine long-term positioning experiments to collect relevant data Calculate and analyze the crop and straw yields, straw nutrient content, soil nutrient and organic carbon status, greenhouse gas emissions and nitrogen leaching in the Huantai region from 1980 to 2014, and systematically evaluate the farmland ecological effects of straw returning. The study found that by 2014, the contribution rate of the two seasons of straw